command-line completion in Karaf causes fatal error

[fabrice-ducos]

Problem observed with Karaf 4.4.7 on Windows 10 Professional

Command line completion after a double quote causes a fatal error.

C:\Users\Username\Projects\apache-karaf-4.4.7>karaf clean
karaf.bat: Ignoring predefined value for KARAF_HOME
        __ __                  ____
       / //_/____ __________ _/ __/
      / ,<  / __ `/ ___/ __ `/ /_
     / /| |/ /_/ / /  / /_/ / __/
    /_/ |_|\__,_/_/   \__,_/_/

  Apache Karaf (4.4.7)

Hit '<tab>' for a list of available commands
and '[cmd] --help' for help on a specific command.
Hit '<ctrl-d>' or type 'system:shutdown' or 'logout' to shutdown Karaf.

karaf@root()> hello = "<TAB>
Error executing command: Range [0, 1) out of bounds for length 0
C:\Users\Username\Projects\apache-karaf-4.4.7>

[jbonofre]

Thanks for the report. Does it happen with Karaf 4.4.9 too ?

[fabrice-ducos]

Hi JB, many thanks for your quick answer!

I confirm that it also occurs for Karaf 4.4.9

C:\Users\Username\Projects\apache-karaf\apache-karaf-4.4.9>karaf
karaf.bat: Ignoring predefined value for KARAF_HOME
karaf.bat: KARAF_LOG doesn't exist: "C:\Users\Username\Projects\apache-karaf\apache-karaf-4.4.9\bin\..\data\log"
karaf.bat: Creating "C:\Users\Username\Projects\apache-karaf\apache-karaf-4.4.9\bin\..\data\log"
        __ __                  ____
       / //_/____ __________ _/ __/
      / ,<  / __ `/ ___/ __ `/ /_
     / /| |/ /_/ / /  / /_/ / __/
    /_/ |_|\__,_/_/   \__,_/_/

  Apache Karaf (4.4.9)

Hit '<tab>' for a list of available commands
and '[cmd] --help' for help on a specific command.
Hit '<ctrl-d>' or type 'system:shutdown' or 'logout' to shutdown Karaf.

karaf@root()> hello = "<TAB>
Error executing command: Range [0, 1) out of bounds for length 0
C:\Users\Username\Projects\apache-karaf\apache-karaf-4.4.9>

The bug seems to occur with strings at the right side of an assignment.

[jbonofre]

Thanks for the update. Let me try to reproduce.

[jbonofre]

OK, I see the issue in JLine (org.jline.reader.impl.CompletionMatcherImpl.defaultMatchers(CompletionMatcherImpl.java:131)). Let me fix that.